CN105080706B - A kind of low grade gold ore recovery process - Google Patents

A kind of low grade gold ore recovery process Download PDF

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Publication number
CN105080706B
CN105080706B CN201510506479.0A CN201510506479A CN105080706B CN 105080706 B CN105080706 B CN 105080706B CN 201510506479 A CN201510506479 A CN 201510506479A CN 105080706 B CN105080706 B CN 105080706B
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mine tailing
concentrate
grades
flotation
spiral chute
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CN105080706A (en
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卯伟伟
杨佳泉
李文高
卢富成
梁万仓
方晓博
冯景民
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Aolai Eco-technology (Shenzhen) Co., Ltd.
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卯伟伟
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/52Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly

Abstract

A kind of low grade gold ore recovery process, belong to gold mine recycling field, one-level screening is carried out successively after raw ore is slightly broken, two grades of screenings, three-level is sieved, three-level screen size≤1.5mm grades are pumped into the first spiral chute gravity treatment after sizing mixing and obtain rough concentrate, chats and mine tailing, rough concentrate obtains concentrate after entering the second spiral chute gravity treatment, chats and mine tailing, concentrate obtains mine tailing and Gold Concentrate under Normal Pressure after entering ball mill ball milling into the first flotation device flotation, mine tailing after flotation enters magnetic separator, Gold Concentrate under Normal Pressure sequentially enters the second thickener, dry Gold Concentrate under Normal Pressure is obtained after first ceramic filter thickening, mine tailing and iron ore concentrate are obtained after magnetic separator magnetic separation, mine tailing after magnetic separation enters shaking table, mine tailing is obtained after shaking table, iron concentrate and thick tungsten concentrate, thick tungsten concentrate obtains tungsten concentrate and mine tailing after entering the second flotation device flotation, the mine tailing after mine tailing and the second flotation device flotation after shaking table sequentially enters the 3rd thickener, second ceramic filter carries out thickening and obtains drystone powder.

Description

A kind of low grade gold ore recovery process
Technical field
The invention belongs to gold mine recovery technology field, and in particular to a kind of low grade gold ore recovery process.
Background technology
Xiaoqinling to Xiong'er shan begins to large-scale gold mine exploitation from the seventies in last century, is produced over more than 40 years by mining A large amount of waste stones (gold content≤0.5g/t), the size gully in each mining area is constantly filled with, the ecology to this area is put down Weigh and produce great hidden danger, and the noble metal in these chats is wasted.
Prior art can not accomplish in the case where head grade is less than 0.5g/t, carry out having higher recovery to gold Industrialization is reclaimed, and " three wastes " produced in production process, and great harm is caused to ecological environment.
Existing Mineral Processing Enterprises, because technology restriction produces substantial amounts of tailings, stack on preserving and there is great potential safety hazard, Easily cause Tailings Dam to collapse, both pollute soil and water ecology environment, and huge economic loss is caused even to nearby residents The threat of life security.
It is all separate single one that existing noble metal recovery technology is most of, without complete set in gold containing ore The industrialized producing technology technology of a variety of efficient synthetical recoveries of noble metal, the economic benefit of generation is relatively low, and wasting phenomenon is tighter Weight.Current gold containing ore technique of preparing is main based on ball milling flotation active carbon adsorption technology.Such a technology production cost is high, And high is required to head grade, it is necessary to and more than 0.5g/t is reached, the discarded of substantial amounts of poor value is thus caused, it is long The accumulation of year month after month, wastes resource and also destroys ecological environment.
It is among the people at present to have a kind of cyanide heap leaching technology, poor value mining tailing can be directed to.But it is crucial in the technology Chemical reagent be extremely toxic substance Cymag.The technological process can produce substantial amounts of hypertoxic waste water, on soil water quality influence more Seriously, and not easy-clear.Therefore, country prohibites cyanide heap leaching technology, thus causes substantial amounts of low-grade containing gold Ore can not be reclaimed.
The content of the invention
It is an object of the invention to provide a kind of low grade gold ore recovery process.
Based on above-mentioned purpose, this invention takes following technical scheme:
A kind of low grade gold ore recovery process, comprises the following steps:
(1)By crushing raw ore to≤600mm, one-level screening is carried out, after one-level screening≤10mm grades feed two grades of screenings, Two grades of screening≤5mm grades feed three-level screening;
(2)Three-level screen size≤1.5mm grades are pumped into the first spiral chute gravity treatment after sizing mixing and obtain rough concentrate, chats And mine tailing, rough concentrate after gravity treatment obtains concentrate, chats and mine tailing after entering the second spiral chute gravity treatment;
(3)Concentrate after second spiral chute gravity treatment enters after ball mill, ball milling obtains tail into the first flotation device flotation Ore deposit and Gold Concentrate under Normal Pressure, the mine tailing after flotation enter magnetic separator, and Gold Concentrate under Normal Pressure sequentially enters the second thickener, the concentration of the first ceramic filter Dry Gold Concentrate under Normal Pressure is obtained after dehydration, mine tailing and iron ore concentrate are obtained after the magnetic separation of magnetic separator, the mine tailing after magnetic separation enters shaking table, shakes Mine tailing, iron concentrate and thick tungsten concentrate are obtained after bed, thick tungsten concentrate obtains tungsten concentrate and mine tailing after entering the second flotation device flotation, shaken Bed after mine tailing and the mine tailing after the second flotation device flotation sequentially enter the 3rd thickener, the second ceramic filter concentrated, Dehydration obtains drystone powder.
The one-level screening product feeds different fine crushing devices according to grade, and granularity >=60mm grades feed Hubei Province formula and crushed Machine is in small, broken bits, and 30mm < granularity < 60mm grades feed that compound gyratory crusher is in small, broken bits, and 10mm < granularities≤30mm grades feed system Sand machine, granularity≤10mm grades directly feed two grades of screenings, and jaw crusher and compound gyratory crusher product in small, broken bits return to one Level screening, sand making machine granularity≤10mm grades feed two grades of screenings;Two grades of screen size >=20mm grades and 5mm < granularities < 10mm grades return to sand making machine, and granularity≤5mm grades enter fines storehouse, and 10mm≤granularity < 20mm grades are produced to build rubble Product;The ore of granularity≤5mm grades sieves prescreening through three-level in fines storehouse, and granularity > 1.5mm grades feed rod mill mill Ore discharge returns to three-level screening and carries out check screening after ore deposit, ore grinding;Granularity≤1.5mm grades feed the first spiral chute gravity treatment.
The mine tailing after mine tailing, chats and the second spiral chute gravity treatment, chats after first spiral chute gravity treatment enter the 3rd Rough concentrate, chats and mine tailing are obtained after spiral chute gravity treatment, the rough concentrate after the 3rd spiral chute gravity treatment is back to the second spiral Chute, the spiral chute of middling recurrence the 3rd, mine tailing are sieved into level Four, and level Four is tailed over as finished product sand, and undersize material is through the Enter the 4th spiral chute after the dehydration concentration of one thickener, the rough concentrate after the 4th spiral chute gravity treatment returns to the second spiral and slipped Groove, the spiral chute of middling recurrence the 3rd, mine tailing enter the 3rd thickener.
Present invention tool has the advantage that:
(1)Realize to gold containing ore head grade≤0.5g/t raw ore and to reach higher recovery by industrializing recovery Purpose;
(2)This technique can realize the synthetical recovery to a variety of noble metals in gold containing ore, while can pass through industry Change is reclaimed with the higher rate of recovery;
(3)Industrial " three Waste " is not produced in whole production process, meets national environmental protection policy;
(4)Gold mine barren rock waste residue is turned waste into wealth in the realization of the technique, has both been generated higher economic benefit, has been changed again It has been apt to the ecological environment of locality, technical guarantee is provided for the long-term sustainable development of bargh.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Embodiment
Technical scheme is described in further detail below in conjunction with specific embodiment, but the protection model of the present invention Enclose and be not limited thereto.
Embodiment 1
As shown in figure 1, a kind of low grade gold ore recovery process, comprises the following steps:Raw ore(Au contents are 0.3- 0.5g/t)Granularity≤600mm, boulder crusher is fed with oscillating feeder, and coarse smash equipment selects 1 750 × 1060 jaw crusher, Coarse crushing product (80-120mm) is delivered to one-level screening through belt conveyor, and screening plant selects 3YK2160 circular shale shakers, screening Product feeds different fine crushing devices according to grade, and it is in small, broken bits that granularity >=60mm grades feed PEX250 × 1200 jaw crushers, 30mm < granularity < 60mm grades feed PYFD1310 be combined gyratory crusher it is in small, broken bits, 10mm < granularities≤30mm grades are fed VI-900 sand making machines, granularity≤10mm grades directly feed two grades of screenings, the jaw crusher of PEX250 × 1200 and PYFD1310 Compound gyratory crusher product in small, broken bits returns to one-level screening, sand making machine ore discharge, granularity≤10mm grades through belt conveyor conveying Feed two grades of screenings, equipment choosing 3YK2160 circular shale shakers, two grades of screen size >=20mm grades and 5mm < granularity < 10mm Grade returns to sand making machine, and granularity≤5mm grades are delivered to fines storehouse through belt conveyor, and 10mm≤granularity < 20mm grades are to build If rubble product.The ore of granularity≤5mm grades is fed with electro-vibrating feeder in fines storehouse, through the advance sieve of three-level screening Point, screening plant rolls over emaciated face water sieve from ZZK1848, and granularity > 1.5mm grades feed rod mill(MB1530 types)Ore grinding, ore grinding Ore discharge returns to three-level screening and carries out check screening afterwards;Three-level screen size≤1.5mm grades are sized mixing through adding water, and (pulp density is The first spiral chute gravity treatment 30-50wt%) is fed with Pulp pump and obtains rough concentrate(Au contents are 3-5g/t), (Au contents are chats 0.2-3g/t) and mine tailing (Au contents≤0.2g/t), the rough concentrate after gravity treatment enter obtained after the second spiral chute gravity treatment concentrate, Chats and mine tailing, the concentrate after the second spiral chute gravity treatment enter ball mill(MQ1224 type ball mills), after ball milling(Pulp density For 50-60wt%, 60-70% more than the mesh of fineness -200 is reached)Enter the first flotation device flotation through FG1000 high weir spiral classifiers Mine tailing and Gold Concentrate under Normal Pressure are obtained, the mine tailing after flotation enters magnetic separator, Gold Concentrate under Normal Pressure sequentially enters the second thickener(Equipment choosing diameter 8m thickeners), the first ceramic filter(Equipment choosing 6m2 ceramic filters)Dry Gold Concentrate under Normal Pressure is obtained after thickening(It is aqueous ≤12%)And water, mine tailing and iron ore concentrate are obtained after the magnetic separation of magnetic separator, the mine tailing after magnetic separation is obtained after entering shaking table, shaking table Mine tailing, iron concentrate and thick tungsten concentrate, thick tungsten concentrate obtain the tail after tungsten concentrate and mine tailing, shaking table after entering the second flotation device flotation Mine tailing after ore deposit and the second flotation device flotation sequentially enters the 3rd thickener(Equipment choosing diameter 15m thickeners), second ceramics Filter(Equipment choosing 80m2 ceramic filters)Concentrated, be dehydrated and obtain drystone powder(Aqueous≤12%).
The mine tailing after mine tailing, chats and the second spiral chute gravity treatment, chats after first spiral chute gravity treatment enter the 3rd Rough concentrate, chats and mine tailing are obtained after spiral chute gravity treatment, the rough concentrate after the 3rd spiral chute gravity treatment is back to the second spiral Chute, the spiral chute of middling recurrence the 3rd, mine tailing are sieved into level Four, and screening plant rolls over emaciated face water sieve, four from ZZK1848 types Level tails over sand product in the national standard for granularity 0.15mm~3.0mm, and undersize level product concentrates de- through diameter 12m concentrators Water(Concentration is 30-40wt%)Underflow ore pulp feeds the 4th spiral chute afterwards, and the rough concentrate after the 4th spiral chute gravity treatment is returned Second spiral chute, the spiral chute of middling recurrence the 3rd, mine tailing enter the 3rd thickener.
The jaw crusher of 750 × 1060 jaw crusher, PEX250 × 1200, PYFD1310 are combined cone crusher Machine, sand making machine, 3YK2160 circular shale shakers are equal is connected with deduster.
All dust separate dedusting through high-efficiency wet-type dust collector in production process, and whole industrial waters realize closed cycle profit With so as to reach three industrial wastes zero-emission.

Claims (2)

1. a kind of low grade gold ore recovery process, it is characterised in that comprise the following steps:
(1)By crushing raw ore to≤600mm, one-level screening is carried out, one-level sieves product and feeds different in small, broken bits set according to grade Standby, granularity >=60mm grades feed that jaw crusher is in small, broken bits, and it is thin that 30mm < granularity < 60mm grades feed compound gyratory crusher Broken, 10mm < granularities≤30mm grades feed sand making machine, and granularity≤10mm grades directly feed two grades of screenings, jaw crusher and Compound gyratory crusher product in small, broken bits returns to one-level screening, and sand making machine granularity≤10mm grades feed two grades of screenings, two grades of screenings Granularity >=20mm grades and 5mm < granularity < 10mm grades return to sand making machine, and granularity≤5mm grades enter fines storehouse, and 10mm≤ Granularity < 20mm grades are construction rubble product;The ore of granularity≤5mm grades sieves prescreening, grain through three-level in fines storehouse Degree > 1.5mm grades feed ore discharge after rod mill ore grinding, ore grinding and return to three-level screening progress check screening;Granularity≤1.5mm Level feeds the first spiral chute gravity treatment;
(2)Three-level screen size≤1.5mm grades are pumped into the first spiral chute gravity treatment after sizing mixing and obtain rough concentrate, chats and tail Ore deposit, the rough concentrate after gravity treatment obtains concentrate, chats and mine tailing after entering the second spiral chute gravity treatment;
(3)Concentrate after second spiral chute gravity treatment enter after ball mill, ball milling into the first flotation device flotation obtain mine tailing and Gold Concentrate under Normal Pressure, the mine tailing after flotation enters magnetic separator, and Gold Concentrate under Normal Pressure sequentially enters the second thickener, the first ceramic filter thickening After obtain dry Gold Concentrate under Normal Pressure, mine tailing and iron ore concentrate are obtained after the magnetic separation of magnetic separator, the mine tailing after magnetic separation enters after shaking table, shaking table To mine tailing, iron concentrate and thick tungsten concentrate, thick tungsten concentrate is obtained after tungsten concentrate and mine tailing, shaking table after entering the second flotation device flotation Mine tailing after mine tailing and the second flotation device flotation sequentially enters the 3rd thickener, the second ceramic filter and is concentrated, be dehydrated To drystone powder.
2. low grade gold ore recovery process according to claim 1, it is characterised in that after the first spiral chute gravity treatment Mine tailing, chats after mine tailing, chats and the second spiral chute gravity treatment obtain rough concentrate, chats after entering the 3rd spiral chute gravity treatment And mine tailing, the rough concentrate after the 3rd spiral chute gravity treatment is back to the second spiral chute, the spiral chute of middling recurrence the 3rd, mine tailing Into level Four screening, level Four tails over husky for finished product, and undersize material is after the dehydration concentration of the first thickener into the 4th spiral Chute, the rough concentrate after the 4th spiral chute gravity treatment returns to the second spiral chute, the spiral chute of middling recurrence the 3rd, mine tailing and entered Enter the 3rd thickener.
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CN108246471A (en) * 2018-01-31 2018-07-06 广西华洋矿源材料有限公司 A kind of beneficiation method of manganese ore

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CN105478224A (en) * 2015-12-29 2016-04-13 安徽牛山新型材料科技有限公司 Beneficiation method for low-grade vulcanization type gold-bearing tailings
CN105498952B (en) * 2016-02-02 2017-05-03 大连地拓重工有限公司 Gold tailing processing system and method
CN107243494A (en) * 2016-07-21 2017-10-13 山东九曲圣基新型建材有限公司 A kind of method of use gold tailings waste residue sand
CN107262254A (en) * 2017-06-16 2017-10-20 贵州开磷集团股份有限公司 A kind of rock phosphate in powder closed cycle breaking method
CN108617181A (en) * 2018-04-11 2018-10-09 辽宁万隆科技研发有限公司长沙分公司 A method of utilizing the secondary tailings soil of desert drift-sand
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